Title (en)

INFLATABLE PACKER ELEMENT

Publication

EP 0089146 A3 19850410 (EN)

Application

EP 83301136 A 19830303

Priority

US 35749882 A 19820312

Abstract (en)

[origin: EP0264973A2] An inflatable packer is described comprising an elastomeric tubular core (18), an outer cover (20), an annular reinforcement sheath (22) sandwiched between the core and cover comprising a strength zone (24) composed of strain-resisting elements of high modulus (25) extending helically at alternate lay angles of less than 40 DEG with respect to the packer axis, and sleeve means (28) to which the reinforcement is securely attached at each end of the packer. In one embodiment a transition reinforcement zone (26) is interposed between the tubular core and strength zone to improve the flex properties and increase the life of the packer. In another embodiment an improved anchor means formed of a frustro-conical matrix (32) encapsulates embedded reinforcement members.

IPC 1-7

E21B 33/127

IPC 8 full level

E21B 33/127 (2006.01); F16J 15/46 (2006.01)

CPC (source: EP US)

E21B 33/1277 (2013.01 - EP US); F16J 15/46 (2013.01 - EP US)

Citation (search report)

• [XP] GB 2099541 A 19821208 - CAOUTCHOUC MANUF PLASTIQUE
• [AD] US 3028915 A 19620410 - JENNINGS EARL R
• [AD] US 2872230 A 19590203 - ROBERT DESBRANDES
• [AD] US 4191383 A 19800304 - BAKER EUGENE E [US], et al
• [A] US 2778431 A 19570122 - JOHN LYNES
• [AD] US 2643722 A 19530630 - JOHN LYNES, et al
• [A] US 2778432 A 19570122 - ALLEN GEORGE H

Designated contracting state (EPC)

BE DE FR GB IT NL SE

DOCDB simple family (publication)

EP 0264973 A2 19880427; EP 0264973 A3 19890125; EP 0264973 B1 19911211; AU 1199283 A 19830915; AU 552911 B2 19860626; BR 8301123 A 19831122; CA 1221027 A 19870428; DE 3379066 D1 19890302; DE 3382477 D1 19920123; EP 0089146 A2 19830921; EP 0089146 A3 19850410; EP 0089146 B1 19890125; ES 520503 A0 19851001; ES 527096 A0 19841101; ES 8501050 A1 19841101; ES 8600481 A1 19851001; JP S58207479 A 19831202; JP S6220356 B2 19870506; MX 155679 A 19880412; NO 168132 B 19911007; NO 168132 C 19920115; NO 830850 L 19830913; US 4614346 A 19860930

DOCDB simple family (application)

EP 87201048 A 19830303; AU 1199283 A 19830302; BR 8301123 A 19830308; CA 423461 A 19830311; DE 3379066 T 19830303; DE 3382477 T 19830303; EP 83301136 A 19830303; ES 520503 A 19830311; ES 527096 A 19831108; JP 4053883 A 19830311; MX 19654283 A 19830311; NO 830850 A 19830311; US 35749882 A 19820312